DELETEFROMprogramScheduleLEFTJOINprogramONprogramSchedule.pid=program.idWHEREprogram.channel_id=10我收到这个错误:#1064-YouhaveanerrorinyourSQLsyntax;checkthemanualthatcorrespondstoyourMySQLserverversionfortherightsyntaxtousenear'LEFTJOINprogramONprogramSchedule.pid=program.id'atline1为什么？